[ILUG] blocksize for a DLT drive?

[Baldwin_James at emc.com]

Personally, 1mb blocks are too large when backing up small files or
filesystems with low I/O speeds (i.e. NFS mounted over a 10mpb halbe(moon)
duplex network.....but when you are backing up large files, lets say a
filesystem backup of an oracle database(.dbfs), it is indeed better :)

Depends on what you are backing up and how...
Just remember when you are restoring, what block size you used to back up ;)



I might even boldly suggest some heads in some DAT/DLT/DDS/LTO drives are
optimised for certain blocks sizes and should be adhered to.
..
I know some drives can make the data unreadable when selecting custom block
and tape pad sizes (EOT markers)...

how nice is that :) 

J
-----Original Message-----
From: John P. Looney [mailto:valen at tuatha.org]
Sent: Thursday, December 05, 2002 10:44 AM
To: ILUG main list
Subject: Re: [ILUG] blocksize for a DLT drive?


On Thu, Dec 05, 2002 at 10:42:33AM -0000, Leccardi, Diego mentioned:
> Hi Ronan,
> my suggestion is to set the bock size of the DLT to 1024 using the
command:
> 
> mt -t /dev/st0 setblk 1024 <= it should improve the performance a lot
> 
> With the dd command you can use the option "bs=1024k".

 Won't that make 1MB blocks ?

john

-- 
Irish Linux Users' Group: ilug at linux.ie
http://www.linux.ie/mailman/listinfo/ilug for (un)subscription information.
List maintainer: listmaster at linux.ie